In Brittmodelers, Edgard answer me that:

Your man flew many Spitfires, during that time; unfortunately the ORB lists only serial numbers, and no codes, but he flew BL476 (one sortie); BM114 (2); BM156 (5); BM128 (19); BM145 (1); BM228 (2); BM157 (1); BM385 (1); BM236 (1); BM124 (1); BM201 (5); BL928 (1); BM245 (1);BM292 (1); BM136 (1); BL920 (1); BM133 (3).
Edgar